@Component public class MyComponentImpl implements TransferService { // Constructor omitted public Result myMethod(SomeParameter parameter) { // Select the first one to match to invoke? // Select multiple ones to invoke? // Select and fallback to one if none found? // Select and throw an exception if none found? } }
public interface Plugin { public boolean supports(T delimiter ); } public interface PluginRegistry, T> { T getPluginFor(S delimiter); T getPluginFor(S delimiter, T default); T getPluginFor(S del, E e) throws E; List getPluginsFor(S delimiter); … }
@Component public class MyComponentImpl implements TransferService { private final MyPlugin defaultPlugin = new MyDefaultPlugin(); public Result myMethod(String parameter) { // Select the first one to match to invoke? … = plugins.getPluginFor(parameter); // Select multiple ones to invoke? … = plugins.getPluginsFor(parameter); // Select and fallback to one if none found? … = plugins.getPluginFor(parameter, defaultPlugin); // Select and throw an exception if none found? … = plugins.getPluginsFor(parameter, new RuntimeException()); } }
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